Loose Leaf For Anatomy & Physiology: An Integrative Approach
3rd Edition
ISBN: 9781260162493
Author: McKinley Dr., Michael; O'Loughlin, Valerie; Bidle, Theresa
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 29, Problem 1DYB
_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the
- a. amnion.
- b. yolk sac.
- c. cembryoblast.
- d. trophoblast.
Expert Solution & Answer
Summary Introduction
Introduction:
Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.
Answer to Problem 1DYB
Correct answer:
Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.
Explanation of Solution
Reason for the correct statement:
Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.
Hence, option d. is correct.
Reasons for the incorrect statements:
Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect
Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.
Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.
Hence, options a., b., and c. are incorrect.
Conclusion
Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.
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Chapter 29 Solutions
Loose Leaf For Anatomy & Physiology: An Integrative Approach
Ch. 29.1 - Prob. 1LOCh. 29.1 - What distinguishes the pre-embryonic period from...Ch. 29.2 - Prob. 2LOCh. 29.2 - Prob. 3LOCh. 29.2 - Prob. 1WDTCh. 29.2 - Prob. 2WDLCh. 29.2 - Prob. 3WDLCh. 29.2 - Prob. 4LOCh. 29.2 - Prob. 5LOCh. 29.2 - How many cells are present initially in the...
Ch. 29.2 - Prob. 5WDLCh. 29.2 - Prob. 6LOCh. 29.2 - Prob. 7LOCh. 29.2 - Prob. 6WDLCh. 29.2 - Prob. 7WDLCh. 29.2 - Prob. 8LOCh. 29.2 - Prob. 9LOCh. 29.2 - What are the two cell layers of the bilaminar...Ch. 29.2 - Which cell layers give rise to each of the three...Ch. 29.2 - Prob. 10LOCh. 29.2 - Prob. 11LOCh. 29.2 - Prob. 10WDLCh. 29.3 - Prob. 12LOCh. 29.3 - Prob. 13LOCh. 29.3 - Prob. 11WDLCh. 29.3 - Prob. 14LOCh. 29.3 - Prob. 15LOCh. 29.3 - Prob. 12WDLCh. 29.3 - Prob. 13WDLCh. 29.3 - LEARNING OBJECTIVE
16. Define organogenesis and...Ch. 29.3 - Why is it important for a pregnant woman to...Ch. 29.4 - LEARNING OBJECTIVE
17. Describe the major events...Ch. 29.4 - Prob. 15WDLCh. 29.5 - LEARNING OBJECTIVE
18. Compare and contrast the...Ch. 29.5 - WHAT DID YOU LEARN?
16 What are some of the...Ch. 29.5 - LEARNING OBJECTIVE
19. Discuss the critical...Ch. 29.5 - Prob. 20LOCh. 29.5 - How do estrogen and progesterone act to sustain...Ch. 29.5 - What are the actions of CRH, HPL, oxytocin, and...Ch. 29.5 - Prob. 21LOCh. 29.5 - Prob. 22LOCh. 29.5 - Prob. 2WDTCh. 29.5 - Prob. 19WDLCh. 29.5 - Prob. 20WDLCh. 29.5 - Prob. 23LOCh. 29.5 - Prob. 24LOCh. 29.5 - Prob. 21WDLCh. 29.5 - Prob. 22WDLCh. 29.5 - Prob. 25LOCh. 29.5 - Prob. 26LOCh. 29.5 - Prob. 23WDLCh. 29.5 - Prob. 24WDLCh. 29.5 - Prob. 27LOCh. 29.5 - Prob. 25WDLCh. 29.6 - LEARNING OBJECTIVE
28. Explain the physiologic...Ch. 29.6 - How do progesterone, estrogen, and oxytocin...Ch. 29.6 - LEARNING OBJECTIVE
29. List the signs and...Ch. 29.6 - Prob. 27WDLCh. 29.6 - LEARNING OBJECTIVE
30. Explain the signs and...Ch. 29.6 - LEARNING OBJECTIVE
31. Describe the positive...Ch. 29.6 - Prob. 28WDLCh. 29.6 - Prob. 29WDLCh. 29.6 - Prob. 32LOCh. 29.6 - Prob. 30WDLCh. 29.6 - Prob. 31WDLCh. 29.7 - Prob. 33LOCh. 29.7 - Prob. 34LOCh. 29.7 - Prob. 3WDTCh. 29.7 - Prob. 32WDLCh. 29.7 - Prob. 33WDLCh. 29.8 - Prob. 35LOCh. 29.8 - Prob. 34WDLCh. 29.8 - Prob. 36LOCh. 29.8 - Prob. 35WDLCh. 29.8 - Prob. 37LOCh. 29.8 - Prob. 4WDTCh. 29.8 - How does the positive feedback mechanism in...Ch. 29.8 - Prob. 38LOCh. 29.8 - Prob. 37WDLCh. 29.9 - Prob. 38WDLCh. 29.9 - Prob. 40LOCh. 29.9 - How does codominant inheritance differ from...Ch. 29.9 - Prob. 41LOCh. 29.9 - Prob. 40WDLCh. 29.9 - Prob. 42LOCh. 29.9 - Prob. 41WDLCh. 29 - _____ 1. The outer layer of the blastocyst that...Ch. 29 - _____ 2. At about day 3 after fertilization, the...Ch. 29 - During gastrulation, cells from the _____ layer of...Ch. 29 - ______ 4. The cells of the embryoblast...Ch. 29 - _____ 5. Which of the following is not an...Ch. 29 - _____ 6. All of the following cardiovascular...Ch. 29 - _____ 7. After a woman gives birth, what happens...Ch. 29 - _____ 8. Freckles are considered to be a dominant...Ch. 29 - _____ 9. Skin color is a trait that is determined...Ch. 29 - A woman is a carrier for the color-blindness gene,...Ch. 29 - Briefly describe the process of fertilization,...Ch. 29 - List the five regions of the mesoderm, and...Ch. 29 - Explain why teratogens are especially harmful to...Ch. 29 - Describe the differences between the embryonic...Ch. 29 - Prob. 15DYBCh. 29 - Prob. 16DYBCh. 29 - Prob. 17DYBCh. 29 - Describe the various ways by which the mothers...Ch. 29 - Compare and contrast strict dominant-recessive...Ch. 29 - Explain the difference between X-linked recessive...Ch. 29 - Prob. 1CALCh. 29 - Ashley is a 29-year-old pregnant woman who is in...Ch. 29 - Ashley is a 29-year-old pregnant woman who is in...Ch. 29 - Prob. 4CALCh. 29 - Ashley is a 29-year-old pregnant woman who is in...Ch. 29 - Prob. 1CSLCh. 29 - Prob. 2CSLCh. 29 - Prob. 3CSL
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